<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>黄坤坤系统 - 首页</title>
    <style>
        /* 基础样式重置与全局设置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            min-height: 100vh;
            background-color: #f0f2f5;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 20px;
            text-align: center;
        }

        /* 页面容器 */
        .container {
            max-width: 800px;
            width: 100%;
            padding: 40px 20px;
        }

        /* 标题样式 */
        .system-title {
            color: #1a73e8;
            font-size: 2.5rem;
            margin-bottom: 15px;
            letter-spacing: 0.5px;
            text-shadow: 0 1px 2px rgba(0,0,0,0.1);
        }

        /* 描述文本 */
        .system-desc {
            color: #5f6368;
            font-size: 1.1rem;
            margin-bottom: 30px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 登录按钮样式 */
        .login-btn {
            display: inline-block;
            background-color: #1a73e8;
            color: white;
            text-decoration: none;
            padding: 12px 32px;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 500;
            transition: all 0.3s ease;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            border: none;
            cursor: pointer;
        }

        .login-btn:hover {
            background-color: #1557b0;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.15);
        }

        .login-btn:active {
            transform: translateY(0);
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        /* 装饰元素 */
        .decor {
            position: fixed;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            z-index: -1;
            opacity: 0.1;
        }

        .decor.top-left {
            top: -100px;
            left: -100px;
            background: linear-gradient(135deg, #1a73e8, #4285f4);
        }

        .decor.bottom-right {
            bottom: -100px;
            right: -100px;
            background: linear-gradient(45deg, #34a853, #1a73e8);
        }

        /* 页脚 */
        footer {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 15px;
            color: #5f6368;
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 600px) {
            .system-title {
                font-size: 2rem;
            }

            .login-btn {
                width: 100%;
                padding: 12px;
            }
        }
    </style>
</head>
<body>
<!-- 装饰元素 -->
<div class="decor top-left"></div>
<div class="decor bottom-right"></div>

<div class="container">
    <h1 class="system-title">欢迎来到黄坤坤系统</h1>
    <p class="system-desc">高效、安全的系统平台，为您提供便捷的服务体验</p>
    <a href="/login" class="login-btn">点击登录</a>
</div>

<footer>
    © 2025 黄坤坤系统 | 版权所有
</footer>
</body>
</html>